//
// "$Id: fl_labeltype.cxx 8864 2011-07-19 04:49:30Z greg.ercolano $"
//
// Label drawing routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// Drawing code for the (one) common label types.
// Other label types (symbols) are in their own source files
// to avoid linking if not used.

#include "Fl.H"
#include "Fl_Widget.H"
#include "Fl_Group.H"
#include "fl_draw.H"
#include "Fl_Image.H"

void
fl_no_label(const Fl_Label*,int,int,int,int,Fl_Align) {}

void
fl_normal_label(const Fl_Label* o, int X, int Y, int W, int H, Fl_Align align)
{
	fl_font(o->font, o->size);
	fl_color((Fl_Color)o->color);
	fl_draw(o->value, X, Y, W, H, align, o->image);
}

void
fl_normal_measure(const Fl_Label* o, int& W, int& H)
{
	fl_font(o->font, o->size);
	fl_measure(o->value, W, H);
	if (o->image) {
		if (o->image->w() > W) W = o->image->w();
		H += o->image->h();
	}
}

#define MAX_LABELTYPE 16

static Fl_Label_Draw_F* table[MAX_LABELTYPE] = {
	fl_normal_label,
	fl_no_label,
	fl_normal_label,	// _FL_SHADOW_LABEL,
	fl_normal_label,	// _FL_ENGRAVED_LABEL,
	fl_normal_label,	// _FL_EMBOSSED_LABEL,
	fl_no_label,		// _FL_MULTI_LABEL,
	fl_no_label,		// _FL_ICON_LABEL,
	// FL_FREE_LABELTYPE+n:
	fl_no_label, fl_no_label, fl_no_label,
	fl_no_label, fl_no_label, fl_no_label,
	fl_no_label, fl_no_label, fl_no_label
};

static Fl_Label_Measure_F* measure[MAX_LABELTYPE];

/** Sets the functions to call to draw and measure a specific labeltype. */
void Fl::set_labeltype(Fl_Labeltype t,Fl_Label_Draw_F* f,Fl_Label_Measure_F*m)
{
	table[t] = f;
	measure[t] = m;
}

////////////////////////////////////////////////////////////////

/** Draws a label with arbitrary alignment in an arbitrary box. */
void Fl_Label::draw(int X, int Y, int W, int H, Fl_Align align) const
{
	if (!value && !image) return;
	table[type](this, X, Y, W, H, align);
}
/**
    Measures the size of the label.
    \param[in,out] W, H : this is the requested size for the label text plus image;
         on return, this will contain the size needed to fit the label
*/
void Fl_Label::measure(int& W, int& H) const
{
	if (!value && !image) {
		W = H = 0;
		return;
	}

	Fl_Label_Measure_F* f = ::measure[type];
	if (!f) f = fl_normal_measure;
	f(this, W, H);
}

/** Draws the widget's label at the defined label position.
    This is the normal call for a widget's draw() method.
 */
void Fl_Widget::draw_label() const
{
	int X = x_+Fl::box_dx(box());
	int W = w_-Fl::box_dw(box());
	if (W > 11 && align()&(FL_ALIGN_LEFT|FL_ALIGN_RIGHT)) {
		X += 3;
		W -= 6;
	}
	draw_label(X, y_+Fl::box_dy(box()), W, h_-Fl::box_dh(box()));
}

/** Draws the label in an arbitrary bounding box.
    draw() can use this instead of draw_label(void) to change the bounding box
 */
void Fl_Widget::draw_label(int X, int Y, int W, int H) const
{
	// quit if we are not drawing a label inside the widget:
	if ((align()&15) && !(align() & FL_ALIGN_INSIDE)) return;
	draw_label(X,Y,W,H,align());
}

/** Draws the label in an arbitrary bounding box with an arbitrary alignment.
    Anybody can call this to force the label to draw anywhere.
 */
void Fl_Widget::draw_label(int X, int Y, int W, int H, Fl_Align a) const
{
	if (flags()&SHORTCUT_LABEL) fl_draw_shortcut = 1;
	Fl_Label l1 = label_;
	if (!active_r()) {
		l1.color = fl_inactive((Fl_Color)l1.color);
		if (l1.deimage) l1.image = l1.deimage;
	}
	l1.draw(X,Y,W,H,a);
	fl_draw_shortcut = 0;
}

// include these vars here so they can be referenced without including
// Fl_Input_ code:
#include "Fl_Input_.H"

//
// End of "$Id: fl_labeltype.cxx 8864 2011-07-19 04:49:30Z greg.ercolano $".
//
